Finding the Fourth Proportional to 87,991.10, 121,434.72 and 49,758.69

Step by Step Solution

1. Step 1: Write the proportion equation
   87,991.10 : 121,434.72 = 49,758.69 : x
2. Step 2: Convert to fraction form
   87,991.10/121,434.72 = 49,758.69/x
3. Step 3: Cross multiply
   87,991.10x = 121,434.72 × 49,758.69
4. Step 4: Simplify right side
   87,991.10x = 6,042,432,587.72
5. Step 5: Solve for x
   x = 6,042,432,587.72/87,991.10
6. Step 6: Final answer
   x = 68,670.96